|Ordered||23 Sep 1939|
|Laid down||20 May 1940||Danziger Werft AG, Danzig (werk 104)|
|Launched||26 Feb 1941|
|Commissioned||25 Jun 1941||Oblt. Heinz-Ehlert Clausen|
|Successes||2 ships sunk, total tonnage 12,946 GRT|
Sunk 18 Aug, 1943 in the mid-Atlantic near Dakar, in position 13.42N, 17.36W, by depth charges from a French Wellington aircraft (Sqdn. 344/HZ697). 49 dead (all hands lost). (FDS/NHB, June 1993).
Previously recorded fate
- Sunk 18 Aug, 1943 in the mid-Atlantic near Dakar, in position 14.11N, 17.40W, by depth charges from a British Hudson aircraft (Sqdn. 200/O). (Postwar assessment)
Notes. This attack was also against the U-403 without inflicting heavy damages.
U-403 operated with the following Wolfpacks during its career:
Aufnahme (7 Mar 1942 - 11 Mar 1942)
Blücher (11 Mar 1942 - 18 Mar 1942)
Bums (6 Apr 1942 - 14 Apr 1942)
Blutrausch (15 Apr 1942 - 18 Apr 1942)
Nebelkönig (7 Aug 1942 - 14 Aug 1942)
Trägertod (12 Sep 1942 - 19 Sep 1942)
Falke (15 Jan 1943 - 19 Jan 1943)
Haudegen (19 Jan 1943 - 15 Feb 1943)
Taifun (15 Feb 1943 - 20 Feb 1943)
Amsel (26 Apr 1943 - 3 May 1943)
Amsel 4 (3 May 1943 - 6 May 1943)
Rhein (7 May 1943 - 10 May 1943)
Attacks on this boat and other events
6 Feb 1943
A Canadian Canso flying boat (RCAF Sqdn 5) strafed and dropped three bombs on the boat off Newfoundland, causing moderate damage. (Sources: Rohwer)
30 Jul 1943
The boat was proceeding on the surface with U-43 when Wildcat and Avenger aircraft from escort carrier HMS Santee attacked. Both boats dived: two depth charges were dropped on U-403, and a Fido homing torpedo was launched at U-43. U-403 escaped, but U-43 was lost with her crew of 55. (Sources: Blair, vol 2, page 397)
18 Aug 1943
An attack on U-403 on 18 Aug. 1943 in the Atlantic off Dakar in position 14.11N, 17.40W, in which a British Hudson aircraft (Sqdn. 200/O) dropped depth charges, was believed to have sunk her, but caused only minor damage.
The boat was sunk later the same day in another attack.(Sources: 1993-06-01, FDS/NHB)
4 recorded attacks on this boat.
General notes on this boat
10 May 1943. The boat had a gunnery duel with the Dutch merchant Dexterous.
Men lost from U-boats
Unlike many other U-boats, which during their service lost men due to accidents and various other causes, U-403 did not suffer any casualties (we know of) until the time of her loss.
We have 1 emblem entry for this boat. See the emblem page for this boat or view emblems individually below.